Power-shovel



Patented May 9, I899.

- a. KIESLEB POWER SHOVEL. (Appliegtion med Feb. 1o, 1899.)

2 Sheets-Sheet I.

(No Model.)

N0. 624,660. Patented May 9,1899 J KIESLER POWER SHOVEL.

2 Sheets-Shut 2.

NITED STATES PATENT OFFICE.

JOSEPH KIESLER, OF CHICAGO, ILLINOIS.

POWER-SHOVEL.

SPECIFICATION forming part of Letters Patent No. 624,660, dated May 9,1899.

Application filed February 10, 1899. Serial No- 705,l50. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH KIEsLER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Power-Shovels, of which thefollowing is a specification.

My invention relates particularly to an improvement in power-shovels foruse in unloading coal, grain, and the like material, as from the hull ofa boat, and for analogous uses.

A power-shovel of the class to which my improvement relates involves asits generallystated construction a pair of pivoted scoopshapedcooperating jaws provided with mechanism for closing them on thematerial to be transferred, thereby to fill the shovel with the latter,and for opening them to discharge the materialat the point to which itis transferred.

My improvement relates particularly to the mechanism for operating theshovel-jaws, my object being to provide anovel and peculiarly eifectivemechanism for this purpose, whereby, moreover, the weight of the jawsneed not be nearly so great as is common in this class of shovels toadapt them to perform their filling function.

My present invention is in the nature of an improvement on the shovelfor which Patent No. 563,492 was granted to me July 7, 1896.

It consists, generally stated, in the novel means herein shown forcausing the force applied at the lifting-cable to be transmuted -intoforces acting in a peculiarly effective manner to close the jaws of theshovel.

In brief, my present invention lies in lengthening and thickening thebars or links by means of which the dump-cable of the shovel shown insaid patent is connected to the outer upper angles of the scoop-sectionsand supplying the same with a cap-piece, to which is attached one end ofthe lit tin g-cable, which latter passes about a movable pulleyconnected with the links or bars pivotally joined to said jaws at saidangles, which latter links are arranged to convert the direct liftingforce into a force acting at said angles to close the jaws. In otherwords, there are employed in my present invention two sets of links orthrust-bars joined to the outer upper angles of the shovelsections, oneset of which serves to transmit the downward force exerted at thecap-piece to said outer angles, where it acts as a closing force, andthe other set of which serves to transmit the upward force acting on themovable pulley (or drum) into a force acting at said angles to close theshovel-jaws.

In the accompanying drawings, Figure 1 is a transverse sectional view ofa shovel equipped with my improvements, the section being taken asindicated at line 1 of Figs. 5 and 6; Fig. 2, a similar section,'butwith the shovel-jaws shown open; Figs. 3 and 4, views in end elevation,showing the manner of joining theshovel-sections; Fig. 5, a plan sectiontaken as indicatedat line 5 of Fig. 1; Fig. 6, a view in side elevation,and Fig. 7 a view of a modified form of link connection joining themovable pulley employed to the outer angles of the scoop-sections.

A A represent scoop-sections; B B, links or hinge-plates for joiningsaid sections together at their inner upper angles; a a, studs or boltsforming the pivotal connections between said scoop-sections and thelinks B B;

C, a cross bar or shaft supported by and joining the plates B and 13; D,a pulley-block, in the upper portion of which is journaled a movablepulley D and which is provided with a slot 19 for receiving the shaft C;E E, links pivotally joined to said pulley-block and the upper outerangles of the scoop-sections; F F, two pairs of bars or links pivotallyjoined at their lower ends to the outer upper angles of thescoop-sections and at their upper ends to a cap-piece or plate G; H, thelifting-cable, attached at one end to a lug c on the lower surface ofthe plate'G and passing thence about the pulley D and thence through aperforation c in the plate (indicated in dotted lines) to thehoisting-drum, and I the dumpcable, connected withthe plate G by meansof a lug d on the upper surface of the plate. The links E E and F F arejoined to the upper outer angles of the scoop-sections by bolts or rods6 e,preferably extending from one end of the section to the other, asshown.

The operation is as follows: The shovel is lowered (or dropped) by meansof the dumpcable I till the open jaws rest upon the material to betransferred, the dump-cable being rapidly given slack to allow theshovel to fall and exerting an upward force at the pulley twice as greatas the force applied to the hoisting-cable at the hoisting-drum, whichforce exerted at the pulley tends to move the latter relatively towardthe plate G, thereby causing the links E E to approach parallelism onthe principle of the toggle-lever, and

thus exert an ever-increasing closing force at the outer upper angles ofthe scoop-sections. Th us the downward force exerted at the plate G indrawing the plate and pulley D together and also the upward forceexerted at the pulley during this action are both converted into closingforces acting through links upon the outer upper angles of thescoop-sections.

It is obvious that the movable pulley may be replaced by a movable drumwithout departure from my invention. The preferred methodis to use thepulley, however, and tohave the cable connection between the movablerotating member and the cap-piece a continuation of the lifting-cable,as shown. So, also, the connections between the movable pulley and thelinks E E may be changed, if desired. Preferably this connection isindependent of the shaft 0, as herein shown; but this is not vitallyessential. It may be remarked that the shaft 0 is here used only forstrengthening purposes and to act in a sense as a guide to thepulley-block D.

The links E E are shown as joined to the pulley-block D at points f frespectively, the links being of sufficient length to cross, as shown.It is not, however, essential that the links should cross.

Fig. 7 shows the links E E joined .to the pulley D by separate links 'DD instead of by the single pulley-block D, above described.

lVhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination of two coacting scoopsections, bars pivotally joinedat their lower ends to the outer upper angles of said sec tions, acap-piece having pivotal connection with said bars, linkspivotallyjoined at their outer ends to said scoop-sections at the outerupper angles thereof, a dump-cable attached to said cap-piece, a movablerotatable member, connections between the free inner ends of saidlast-named links and said rotatable member, cable connection betweensaid movable rotatable member and cap-piece, and lifting-cable extendingfrom said movable member to the hoisting mechanism, substantially as andfor the purpose set forth.

2. The combination of two suitably-joined coacting scoop-sections, barspivotally joined at their lower ends to the outer upper angles of saidsections, a cap-piece having pivotal connection with said bars, adump-cable atat their outer ends to the outer upper angles of thescoop-sections, a movable pulley, connections between the free innerends of said last-named links and said movable pulley,

and a lifting-cable attached at one end to the under side of saidcap-piece and passing thence about said pulley and thence to thehoisting-drum, substantially as and for the purpose set forth.

31 The combination of two suitably-joined coacting,scoop'sections, barspivotally joined at their lower ends to the outer upper angles of saidsections, a cap-piece having pivotal connection with said bars, adump-cable attached to the cap-piece, links pivotally joined at theirouter ends to the outer upper angles of the scoop-sections, avertically-mow able pulley-block having pivotal connection with the freeends of said last-named links,

a pulley or the like journaled in said block,

necting means between the free ends of said last-named links and saidmember, and cable connections for drawing the cap-piece and rotatablemember relatively toward each other, thereby initially to close thescoop-sections and then raise the load, substantially as and for thepurpose set forth.

5. The combination of two coacting suitably-joined scoop-sections,twopairs of bars F F pivotally joined at their lower ends to the outerupperangles of the scoop-sections, said pairs being on opposite sides ofthe transverse center line, a cap-piece pivotally joined to the upperends of the bars,a dump-cable attached to the cap-piece, links E Epivotally joined at their outer ends to the outer upper angles of thescoop-sections at the longitudinal center of the shovel, a movablepulley or the like, connecting means betweensaid pulley and the freeinner ends of said last-named links, and cable connections for initiallydrawing the pulley and cap-piece relatively toward tached to thecap-piece, links pivotally joined scoop-sections, links pivotally joinedat their upper ends to the outer upper angles of said scoop-sections andcrossing beneath said central shaft and pivotally joined at their freeends to said pulley-block, and cable connection for drawing thecap-piece and pulley rel= atively toward each other to first close thescoop-sections and then raise the load, substantially as and for thepurpose set forth.

7. The combination of scoop-sections A A, hinge-plates B B, centralshaft 0 joining said hinge-plates, a pulley-block provided with a slotthrough Which said shaft passes, links pivotally, connected to saidpulley-block and to said scoop-sections at the outer upper angles of thelatter, a pulley journaled in the pulley-block, bars pivotally joined attheir lower ends to the outer upper angles of said scoop-sections, acap-piece pivotally attached to said bars,a dump-cable connected withthe cap-piece, and cable connection for drawing said pulley andcap-piece relatively together and lifting the load, substantially as andfor the purpose set forth.

JOSEPH KI ESLER.

- In presence of- D. W. LEE, R. T. SPENCER.

